[lkml]   [2010]   [Nov]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: gcc 4.5.1 / as miscompiling drivers/char/i8k.c ?
    On Mon, Nov 15, 2010 at 7:45 PM, Jeff Law <> wrote:
    > On 11/08/10 03:49, Richard Guenther wrote:
    >> On Mon, Nov 8, 2010 at 12:03 AM, Andi Kleen<>  wrote:
    >>> Andreas Schwab<>  writes:
    >>>> The asm fails to mention that it modifies *regs.
    >>> It has a memory clobber, that should be enough, no?
    >> No.  A memory clobber does not cover automatic storage.
    > A memory clobber should clobber anything in memory, including autos in
    > memory; if it doesn't, then that seems like a major problem.  I'd like to
    > see the rationale behind not clobbering autos in memory.

    Non-address taken automatic storage. (note that we don't excercise this
    in optimization yet)

    It's difficult to model thins kind of non-aliased memory with this kind
    of aliasing mechanism (apart from taking all asms as clobbering
    everything as we currently do).


    > Jeff
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2010-11-15 23:09    [W:0.026 / U:6.848 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site